Rotary furnace



June 24, 1.930. "M lSKLOVSKY 1,765,949

ROTARY FURNACE Filed Nov, 1o, 1927 2 sheets-sheet 1 'TFH- l- M555 .l 31 ZW M. SKLOVSKY ROTARY FURNACE June 24, 1930.

2 Sheets-Sheet 2 Filed NOV. l0, 1927 `into which `vtherimfdips, thereby preventing f air orgases from passing.'y around the margin "ofthe rotating member. '.Both' these forms of seals are objectionablejfor variousy rea#v Patented June 24, y1930' QILLINOIS,-1A CORPORATION OF ILLINOIS j "zaoTAnY URNACE:

i M invention relates to'heating jfurnac-es of tii'e rotary 4type" comprising a jr'otating table thatcon'stitutes the'bottom of thev heating chamberv and is 'causedtorotatev by suitable l driving'mechanism, usually'i'n the form principally been' rofy tw'ol kinds, known as the water seal and the sand seal, in both fof which the sealing isv effected by means of Aan ,annular rim securedto kthe rotating/member ofcthe furnace and extending downwardly and revolving in an annular-trough that is kept filled either lwith sandf'or fwith'water sons., Infthecase ofthe sand seal, the sand is "apt to cake',making the. rotationfo'ffthe *tableldiiiiculu and besidesthe frictional engageme'nt of the rim with the sand particles fmakesthe draft heavy and'increases'thejex- Ipense of operation. Alsoy'the sand 'isapt to spill'out to a greater Yorless extent and must be replenished from timeto time.' In "the case of the waterseal,Y there iis also considerable spillingjof the water and itis sub.-V

ject to vaporization. andlfeakageglmaking frequent #replenishment ne ';es.sary;.-I Also, the .dangerI of freezingwheny thek furnace is not Linl 1operatio1`1`-`,increases they cost of *ma-intelnan'c'e. In "addition to' the y' above-types'fof Vsealsl it has als'been Vproposed touse yan air seal', but Athe latter form. ofseal is not eili.

L cientbecause it is diiicult tofinake ittight '-,fenbugh, and with'thegusefoffs'uch air seal the objectionable? Afeatures lof"y the above-inen-A tioned types of sealsv and jtop'rovide 'one v;

bottom of thefurnace isy heated eXcessivly,v which is objectionable 'This formA 'of sealV 1 alsof'requires"excessive clearance,4 which lis luneconomical. f i' The Object @amy invention.'ieiteavoid 'the yapplieaitiw'ala November 1.o.,L 1927.' serial Nazazwgee.

that will operate fefciently Lunder practically Y all conditions with a minimum amountfof attention, which obj eetl accomplish by Yproviding a seal'in the formof a'plurality of rings or plates,y having surfacecontact with` each lother, inthe form of laminations, part 'of such rings or plates being securedv to the rotatingelement of the furnace, and the rest being secured to V.afsuitable stationaryi part of they furnace', the arrangement being such MAX sizLovsKmjoF MoLINEg-@ILLINois' Assrenon fro VDEERE e COMPANY;orivioIfIlv-VE,f n

that the plates carriedfbyV the rotatingelepment' slide over the surfaces-of thev adjacent stationary@plates.l The Contact between the lrelatively'V moving` plates'l is made clo'sejy enough toprevent the passage-of gases between them", buttheyl do not `engage tightly Y enough to interfere objectionablyf with the rotating member 'of the furnace. vPreferably, the contactingl surfaces rarelubricatedwith graphite orsome other suitable mate-y A rial', which reduces friction Aand also? irnVVV vproves the seal. It will 'be "evident thatV by" *mounting such asealing device betwe-enithe rotating member of the furnace and the furf nace .wall-orlsome other` suitably'flocatedk stationary support," the heating :chamber q may be eifectuallysealed."-Such ya sealing device may ybeeasily and cheaply installedl and will. operate l eiiicientlyy with little-eX-f pense forA maintenance.'y i T hef/overlapping rings or plates yare preferably made flat, but

1 they maybe curved or annular in-cross-sectional contour,k and' may be'disposedeitlfier,v

horizontally,` vertically,V ory in an inclined 1 position, as may be preferred.

f V@In the accompanying drawings,y inwhichf I havel shown my'invention embodied vin a posedare employed: -f Q s Figure lisa vertical cross-section of part proved sealgf ,i Y v -lligure. Qlis an enlarged sectional detailV of a rotary furnace illustrating vshowinglmore clearly the 'overlapping elements of the sealand the supporting' devicesm Figure 3 isl an enlarged l sectional f detail.

'showing the connecting devices bywliichthe v 'stationaryfmeinbersjof the seal are 'sup-v` Y ,.Poltedyam Aseal" in whichv fiat 'plates-horizontally* Adiso Figure 4 a partial invert'edplanr view showing one form of driving mechanism vfor rotating the rotatable member of-fthe -fur- A nace.,` o

Referring to f the drawing'syf indicates the Vside wall efthe jfurnaceganel 6 `the arch l that extends over and forms vthe ceiling kof 1o, l tion shown' saidy member is mounted on the upper end' of-'a shaft or pedestal'gthatlis' provided with a gear-,10.-A A. pinion 11 Yrotating the member 8 inlay, of course, Vjlbe variedi, as -any other Vineclh'anisin suitable vfor meshes with said gear-andas driven by (me-ans oa shaft :12 en whichhit is mounted. ,the arrangement shown in Fig, r4 the shaftr12 also carries a spiral gear which lisrdriven by a wor1n-14 jon a shaft f 15 ,ar-

i ,.'rangecl to be Iactua-tedQfrorn any suitable Vsource fofpower.v The mechanism shown for the purposemay'be employed.l f y axis loffthe tableV or kbottomV 8,f whieh is p -ro'- vcured toanel progjetrad-ially from the lower i5 A leide Vfrom its n i-ar-gin to a `point nea-r the central portion of thetab-le ,8f best shown 'in Fig. 1, saidtable is out away on its under flange 17-7 thereby forming'an annular Vshoulder is securedfanannular plate `2O,k pretfera'bly by bolt-s: 21A, and on the .upper surface nf the rl'eietnap'tdnf'the 'YY-plate 20. are

mountef the rings118said rings being.

spaced apart by. spacers 22 mounted onbolts f 22l th'atiirmly secure fthe several rings 18 spacers22 and bolts 22EL are located adjacent jto the shoulder 19 softhat therings 18 `vpreje'ct to the plate 20,l as bestfshown in Fig.- 2, The

" to a'considerable extentl beyondfsaiel spacers.

,-Extendirlginm the Spacesbetween-mala Ying plates 18 are a'series of annulajirrings vEer Aplatesr28 that are jsecuredfinspaced relationfto eaohj other onl a stationaryY Vannular 8 indicates a roiV In 'the illustrated; constructionV I provide lafiixedxsupport for the.v station-ary elements EO ille 'seal inthe form of an annular plate. it-hat issecured Vto the lower margin o i'f'the Side Wall g5 in anysuitable way, as bybolts f 16a, and f extends horizontally toward the to vthe plate 24 by boltsf26, the 'spacersV 25 being of the same thickness as the spacers 22, so that consecutive rings 23; willlit between the several consecutive rings 18. in the manner shown in saidtigure. In the illus-- Y trated construction platef24i's' securedV to iron 271 riveted to the outer marginal portion 'oft the plate 24 by rivetsQS; asshown in Fig.

3, andsecuied 'by 'rivetsz29'to an annular Y f angle bar 30 secured by bolts 31 to therplate' '.75 A

70 the plate 16 .by means of an-annular angle 'Y l rings 28 results in this portion of said plate A having more or less ilexibility, thereby constituting a flexibleattaching means between the furnace Wallf'` and the 'seriesfof'plates 23.4 YSuchY accommodates any slightvaria'-V tfions of heightwhich-maytend to occur' between the two Vseries of lplatesloy reason of l the'rnia l expansion, V'and alsoravjoids' neces- Vsity of vaccurate fitting ormount ing ofthe plates in the -assembly. thereot. As best shown in 1;, the angle bar 30 islocated .a short distance fromthefwallf'nof ftheffulf; nace to provide Va scale Apocket' 82"bet ween fs-aid angle .bar and the r'tur-nace wall. c f

The connections between the Yplates 16 and A are made tig-ht so that gases can netpass the outer :portion ofthe plate 24, and byreav sonni-the surface contactbetween theplates 418 and 28gases kcan not pass between such 1 plates. Thereore,'t he heating chamberris In ll`igr.2`V thev several Q plates 18 andf23 are shown somewhat sep-f" arated romveachfothen but it will beunderstood thatthey areintended to lmake suili: Y ciently 'close contact tofforma seal7V and as has been explained they maybe covered with effectually sealed.

graphite VVor any other suitable lubricant to further `per-feet the seal. It .will be noted that-theitwo series of plates 18 and 23 provide, ineffectya laminated'assembly ,ofro- 'i -niembers be evident that 'although the plates 'l tating and'` stationary cooperating sealing:

:through the plate `2O ,and therefore rotate i with it, andthe plates l23 Ibeifngsecured `t o g the stationary plate 24 remain "stationary,

there willalways be an extended surface/contact between .the'rotatingand stationary 'V l plates which will'eiiiectuallyf seal'theheatingv f .I chamber. Thenumber ofsealingplates used V niay varysconsider-ably, and `preferably anf lequal number of, stationary yand rotating plates are provided;V although that is not es- Y eential. Also, vit will `be evident thati'insed of arranging the sealing ,plates -horizontally1 jas shown they may V bei otherwise 'disposed rsof 1. A sealing device forlrrotating furnaces,413iv Whatl laimias desire Y Y p A to secure by LettersPatent, is z-v M spaced'apartby spacers 25 and are securedv y A L v, 125 long as extended cooperating` vsealing surv y A M W A* y i fiL-acesareprovided.1 Y' V.pjlatef24 mounted OD, the stationary Asupport "161 Assiiownin Fig/2, f`i1eriags` 2a 'are L, f 1,765,949 f comprising a plurality ofrelatively movable continuous circular plates having. wextended surfaces in sealingcontact with each other,

and flexible supportingmeans cooperatingy withsaidplates. ,1, v 2. A sealingl device for rotating furnaces,

com rising rotating and stationar lates b D Vhaving extended surfacesof continuous: cir! cular form in sealing contact with each other, and'exible supporting meansvfor one of said plates permitting rising and falling.

movement thereof. n

43..The combination lwith arotary furnace comprising a wall and a rotating table constituting a heating chamber,of a sealing device comprising a plurality of plates in over-v lapping 'laminated relation to yeach other, f having gas tight connection respectively with v said table andthe furnace wall7 said plates having extended surfaces" in sealing contact with each other. I

Y 4. The combinationfwith` a comprising a wall and a rotating table constituting a heating chamber, of a v'sealing de.n

yvice comprising a set of plates in spaced relation to each other having gas tight connec tion with ,the table,y and a set of' plates yin vspaced relation to each other. havingv gas tight connection with. the furnace. wall, said sets of plates being arranged.- to overlap each rother and having extended surfaces in'sealingcontact with each' other.A l

5. The combination with aV rotary furnace l comprising a wall `and a rotating'table constitutingia heating chamber,ofa sealingde-y vice` comprising a setv of radiallyv disposed lplates secured in spaced relation to each oth*y i er to the under side of said table, and la set of radially disposed plates in spaced lrelation to each other disposed'belowy said table and having gas tight connection with the furnace wvall,y said sets of plates being ,arranged toV overlap each other and'havingl Vextended .sur-

' Vfaces in sealing contact withy eachother.

, with ,each other.

. 6. The combination vwith* a rotary furnace f comprising a wall and a rotating table constituting a heating chamber, of a sealing device comprisingv a set of plates in spaced relation to each other having-"gas tightcon- .nection with the vtable and-r`otating therewith, and a set of plates'in'spacedfrelation to each other having gas tight connection rotary furnace y 8. Thecombinationwith a rotary furnace comprising a ywall and a rotatingtable con-K` stitutinga heating chamber, of a sealing de- 'tight connection with the furnace wall, said Y' sets ofjplates being arranged to v overlap eachother 'andhaving extended surfaces in. se'alingjcontact with each other.

vice comprising aset of plates in spaced re-` 'lation toe'ach other having gas tight connec- V "i tion with ythe table and rotatingtherewith, 'i

and a set of stationary plates in spacedre-l lation to each other rhaving gas tight con` nection with the furnace wall, .said setsy of plates, al plurality of movable plates `overl lapping said stationary plates, one set of saidplatesbeing connected withjone of furnace the aforesaid means, and a flexible attachment between the other jsety of plates and 1 the other'of the aforesaid means, both sets. of plates coacting to form a gas tight connection'respectively with said stationary enclosing means and said rotating table means. l0. .TheA combination with a rotary fury nace Vcomprising stationary enclosing means,

rotating ltable means, a stationary 'plate, a movable plate,-one of lsaid vplates overlap- 7 ping thel other, one of said plates Abeing both Aof, said plates coacting toform a .gas tight connection respectively with said stationary enclosing means and said rotating ytable means.

With the furnace Wallfsadsefs of plates belng arranged 130 Overlapeachother and havv ing extendedV surfaces V`in sealing contact .7. The combinationwith a rotary furnace connected ywith one of the aforesaid means, i v and a flexible attachmentbetween the othermo` plate and the other of the aforesaid means, f

y comprising a Wall and a rotating table con- 1 i i st ituting a heating chamber, of a'sealing de-. Vice comprising a setr of radially disposedV -plates secured in spaced relation to"4 each Y other to the under side of said tablejA and 'f Y rotating therewith', anda set of` radially'disi posed plates iny spacedrelationfto 'each other4 disposed below said table and having gasv p `Max sKLovsKY; Y 

